Create a new print backend for the updated CUPS APIs

printing/backend/cups_ipp_util.h

Index: printing/backend/cups_ipp_util.h
diff --git a/printing/backend/cups_ipp_util.h b/printing/backend/cups_ipp_util.h
new file mode 100644
index 0000000000000000000000000000000000000000..df72d52745066dce1a921d86bada86c883aca566
--- /dev/null
+++ b/printing/backend/cups_ipp_util.h
@@ -0,0 +1,50 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PRINTING_BACKEND_CUPS_IPP_UTIL_H_
+#define PRINTING_BACKEND_CUPS_IPP_UTIL_H_
+
+#include <vector>
+
+#include "base/strings/string_piece.h"
+#include "printing/backend/cups_printer.h"
+#include "printing/backend/print_backend.h"
+
+namespace printing {
+
+// Returns the default ColorModel for |printer|.
+ColorModel DefaultColorModel(const CupsOptionProvider& printer);
+
+// Returns the set of supported ColorModels for |printer|.
+std::vector<ColorModel> SupportedColorModels(const CupsOptionProvider& printer);
+
+// Returns the default paper setting for |printer|.
+PrinterSemanticCapsAndDefaults::Paper DefaultPaper(
+    const CupsOptionProvider& printer);
+
+// Returns the list of papers supported by the |printer|.
+std::vector<PrinterSemanticCapsAndDefaults::Paper> SupportedPapers(
+    const CupsOptionProvider& printer);
+
+// Retrieves the supported number of copies from |printer| and writes the
+// extremeties of the range into |lower_bound| and |upper_bound|  Values are set

[Lei Zhang, 2016/07/21 20:31:30]

s/  /. /

[skau, 2016/07/21 23:33:10]

Done.

+// to -1 if there is an error.
+void CopiesRange(const CupsOptionProvider& printer,
+                 int* lower_bound,
+                 int* upper_bound);
+
+// Returns true if |printer| can do collation.
+bool CollateCapable(const CupsOptionProvider& printer);
+
+// Returns true if |printer| has collation enabled by default.
+bool CollateDefault(const CupsOptionProvider& printer);
+
+// Populates the |printer_info| object with attributes retrived using IPP from
+// |printer|.
+void CapsAndDefaultsFromPrinter(const CupsOptionProvider& printer,
+                                PrinterSemanticCapsAndDefaults* printer_info);
+
+}  // namespace printing
+
+#endif  // PRINTING_BACKEND_CUPS_IPP_UTIL_H_